Chemistry: electrical and wave energy – Processes and products
Patent
1977-01-27
1978-02-21
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204DIG2, 252182, C25D 322
Patent
active
040750663
ABSTRACT:
The present invention provides an ammonia-free acid zinc plating bath for electrodepositing bright zinc on a substrate in which the zinc deposit produced thereby is ductile and presents a glossy to bright coating on the substrate over a wide cathodic current density range. The ammonia-free acid zinc plating baths of the invention comprise zinc ions, chloride ions, at least one polyoxyalkylated naphthol, at least one aromatic carboxylic acid or bath-soluble salt thereof, and at least one anionic aromatic sulfonic acid or bath-soluble salt thereof. In addition to the above components, the ammonia-free acid zinc plating baths of the invention may contain at least one nonionic polyoxyethylene compound and at least one aromatic aldehyde, ketone, or mixtures thereof. The ammonia-free acid zinc plating baths of the invention are free from significant amounts of complexing agents that would impede the removal of zinc ions from the baths prior to disposal.
REFERENCES:
patent: 3767540 (1973-10-01), Rosenberg
patent: 3787297 (1974-01-01), Beckwith et al.
patent: 3855085 (1974-12-01), Rushmere
patent: 3878069 (1975-04-01), Todt et al.
patent: 3891520 (1975-06-01), Todt et al.
patent: 3920528 (1975-11-01), Voss et al.
patent: 3928149 (1975-12-01), Steeg
patent: 4014761 (1977-03-01), Passal
Canaris Valerie
Eckles William Edward
Boisselle Armand P.
Kaplan G. L.
R. O. Hull & Company, Inc.
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